156 



Much like F. obtusa, Sowb., but more elongated, and with 

 its ribs, nnore numerous rays and faintly scolloped margin, as well 

 as its distant locality, it may be regarded as a different species. 

 Some specimens are not rayed, and others are entirely dark 

 purple. 



FissuRELLA occiDENS. Tosta ovata, conica, valde elevata, 

 radiatim multistriata, fasciis atro-purpureis ad 15 et fasciis rosa- 

 ceis alternantibus radiata, apice subcentrali : apertura ovata : 

 facies interna nivea, mjirgine latiusculo viridulo fusco tessel- 

 lato : fissura ovali-rotundata. Long. lj\, lat. lyV? ^^t. 3-^ poll. 

 Hab. Callao. 



In sh-ipe and color it agrees with F. caffra, Chem., from the 

 Cape of Good Hope, and also with F. Praya, Quoy. It is re- 

 markable for its elevated, conical form, and dark, radiate ex- 

 terior. 



FissuRELLA cRuciATA. Tcsta parvula, tenuis, nitida, elongato- 

 ovata, arcuatim elevata, costulis radiantibus prominentibus ad 30, 

 cum filis confertis, ordinatis, concentricis decussata ; apice ante- 

 riori, fissura elongata ; coloribus nigris et albis cruciatim signata : 

 intus nitida, livido et albo similiter picta ; margine crenulato. 

 Long, f, lat. ^, alt. | poll. Hab. Sooloo Sea. 



Similar to F. minuta, Sowb., but nearly twice as large, pro- 

 portionally broader and more elevated, and with the sculpture 

 more in relief; the blue circles about the fissural callus are also 

 wanting. 



DONATIONS TO THE CABINET. 



Copper and Tin ores from Cuba, and Cinnamon stone from 

 Ceylon. From George Ditson, Esq., of Cuba. 



Cranium of a Rodent. From sa?ne. 



Skins of Fyrrhula raptor .^ Psaris erythrogeiiys, Lanius rubi- 

 ginosus, and Psittacus menstruus. From Dr. S. Cabot., Jr. 



ADDITIONS TO THE LIBRARY. 



Milne-Edward M. Histoire Naturelle des Crustacees. 3 vols. 

 8vo, plates. Paris, 1834. From the Courtis Fund. 



Straus-Durckheim, Hercule. Traite d'Anatomie Comparee. 2 

 vols. Svo. Paris, 1843. Same. 



